1. Firm wall for ease of intubations but soften to body temperature to conform to the anatomy of the upper respiratory tract; 2. Kink-resistnat, minimizes possiblility of tube occlusion; 3. Oral/Nasal version a flexible approach to the route of intubation; 4. One-way valve for efficient and easy inflation and deflation of cuff; 5. Comprehensive size range to suit all adolescent and adult tracheal sizes; 6. The size of the trachesl tube inward diameter is printed on the Pilot Balloon. This enables a clear indication of the tracheal tube size in-situ; 7. A black intubations depth marker is located 3cm proximal to the cuff. This assists the accurate placement of the tracheal tube tip within the trachea More Product Features Standard: ISO13485:2003, CE0123 Unit Price/Payment: FOB $0.36/pc Company: Fuqing & Integral Medical Products Co., Ltd.